Taps & Dies

2,000+ products

Expected delivery: Wed, Nov 18

Taps cut internal threads and dies cut external threads. Maintenance techs use them to repair stripped holes and chase damaged threads, and machine shops use them in production. This section covers hand taps in taper, plug and bottoming styles, spiral point (gun) taps for through holes, spiral flute taps for blind holes, NPT pipe taps, thread-forming taps, round adjustable dies, hex rethreading dies, tap wrenches, die stocks and tap and die sets. Threads include UNC, UNF, metric and NPT.

What to check before you order

• Thread size and pitch. Confirm the exact size, for example 1/4"-20 or M6 x 1.0. Our thread sizes guide explains the callouts.
• Hole type. Spiral point taps push chips forward and suit through holes. Spiral flute taps pull chips out and suit blind holes.
• Tap drill. Drill the correct tap drill size first. Too small a hole is a common cause of broken taps.
• Material. HSS taps cover most work. Cobalt or coated taps help in stainless and tougher alloys. Always use tapping fluid in steel.
• Pipe threads. NPT taps are tapered, so tap depth controls the fit.

Common questions

What size drill do I need for a 1/4-20 tap?

A #7 drill is the common choice for about 75 percent thread engagement in a 1/4"-20 hole.

See drill bits, the Alfa Tool line, and all cutting tools.

Taps & Dies: page 19

• Approved Vendor 2-5/8"-8 UNS Carbon Steel Hex Die 8 Pitch SKU 19319 $219.04
• Approved Vendor 2-5/8"-8 UNS HSS Plug Tap SKU 19320 $570.05
• Alfa Tool 2-5/8-16 HSS Special Thread Tap Bottoming SKU HTSPB71529 $556.86
• Alfa Tool 2-56 HSS Eco Pro Hand Tap-Taper SKU HTT270003 $9.46
• Alfa Tool 2-56 HSS Usa Spiral Pointed Tap SKU SPT170103 $12.08
• Alfa Tool 2-64 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170004 $11.80
• Alfa Tool 2-64 HSS Eco Pro Hand Tap-Bottoming SKU HTB270004 $9.46
• Alfa Tool 2-64 HSS Eco Pro Hand Tap-Taper SKU HTT270004 $9.46
• Alfa Tool 2-64 HSS Usa Spiral Pointed Tap SKU SPT170104 $13.66
• Alfa Tool 2-7/8 - 8 Carbon Steel Rethreading Hex Die SKU CSRTD70765 $323.82
• Approved Vendor 2-7/8"-12 UNS Carbon Steel Hex Die SKU 19339 $375.38
• Approved Vendor 2-7/8"-12 UNS HSS Plug Tap SKU 19340 $798.27
• Approved Vendor 2-7/8"-8 UNS Carbon Steel Hex Die 8 Pitch SKU 19341 $287.78
• Approved Vendor 2-7/8"-8 UNS HSS Plug Tap SKU 19342 $697.68
• Alfa Tool 2-7/8-8 HSS Special Thread Tap Bottoming SKU HTSPB71533 $787.52
• Alfa Tool 2-8 HSS Special Thread Tap Bottoming SKU HTSPB71503 $368.30
• Alfa Tool 2.2 X 0.45mm HS Usa Spiral Pointed Tap SKU SPTM170154 $15.64
• Alfa Tool 2.2 X 0.45mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271006 $10.72
• Alfa Tool 2.3 X 0.4mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271007 $10.72
• Alfa Tool 2.5 X 0.45mm HS Usa Spiral Pointed Tap SKU SPTM170155 $13.06
• Alfa Tool 2.5 X 0.45mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271008 $10.72
• DeWalt 2/0 Copper U-Die Set SKU 115-DCE310020CU $192.29/pack of 2
• Alfa Tool 20 X 1.5mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271044 $40.34
• Alfa Tool 20 X 2.0mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271046 $40.34
• Alfa Tool 20 X 2.5mm HS Usa Spiral Pointed Tap SKU SPTM170175 $75.70
• DeWalt 20V Max XR 2-Kit (Grinder/Die Grin SKU 115-DCK203P1 $604.12
• Alfa Tool 21 X 1.00mm HSS Bottoming Metric Tap SKU HSMTB72082 $72.64
• Alfa Tool 21 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72083 $72.64
• Alfa Tool 21 X 2.00mm HSS Bottoming Metric Tap SKU HSMTB72084 $72.64
• Alfa Tool 21 X 2.50mm HSS Bottoming Metric Tap SKU HSMTB72085 $72.64
• Approved Vendor 21/32" HSS Spiral Flute Hand Reamer SKU 19459 $71.81
• Alfa Tool 22 X 1.00mm HSS Bottoming Metric Tap SKU HSMTB72086 $66.50
• Alfa Tool 22 X 2.00mm HSS Bottoming Metric Tap SKU HSMTB72087 $66.50
• Alfa Tool 22 X1.5mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271048 $54.88
• Alfa Tool 22mm - 1.50mm Carbon Steel Metric Hand Tap Bottoming SKU CSMTB70840 $22.02
• Alfa Tool 22mm - 2.50mm Carbon Steel Metric Hand Tap Bottoming SKU CSMTB70841 $22.02
• Alfa Tool 23 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72089 $105.04
• Alfa Tool 23 X 2.00mm HSS Bottoming Metric Tap SKU HSMTB72090 $105.04
• Alfa Tool 23 X 2.50mm HSS Bottoming Metric Tap SKU HSMTB72091 $105.04
• Alfa Tool 23 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72092 $105.04
• Approved Vendor 23/32" HSS Spiral Flute Hand Expansion Reamer SKU 19574 $215.10
• Approved Vendor 23/32" HSS Spiral Flute Hand Reamer SKU 19575 $76.05
• Approved Vendor 23/32" HSS Straight Shank Spiral Flute Chucking Reamer SKU 19580 $43.28
• Alfa Tool 24 X 1.00mm HSS Bottoming Metric Tap SKU HSMTB72093 $87.40
• Alfa Tool 24 X 1.5mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271051 $72.12
• Alfa Tool 24 X 2.0mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271050 $72.12
• Alfa Tool 24mm - 2.00mm Carbon Steel Metric Hand Tap Bottoming SKU CSMTB70842 $24.72
• Alfa Tool 24mm - 3.00mm Carbon Steel Metric Hand Tap Bottoming SKU CSMTB70843 $24.72

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